Air purifier



FIG. 1 is a perspective view of the air purifier showing our design.

FIG. 2 is a front elevation view of thereof;

FIG. 3 is a rear elevation view of thereof;

FIG. 4 is a left side elevation view of thereof.

FIG. 5 is a right side elevation view of thereof;

FIG. 6 is a top plan view of thereof; and,

FIG. 7 is a bottom plan view of thereof.

The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 